针对不同环境条件下的机载MIMO雷达地杂波建模问题,综合考虑了杂波幅度分布模型、杂波单元散射模型以及雷达系统参数模型,提出了一种基于复合模型的杂波建模方法;之后又进一步考虑阵元误差、通道误差和杂波起伏等非理想因素,建立了一种非理想条件下的机载MIMO雷达杂波统一模型;通过改变模型参数对各种杂波的幅度、后向散射系数、各种误差条件的空时二维似然谱和特征谱进行仿真实验.仿真结果表明,理想条件下机载MIMO雷达杂波谱具有良好的斜空时二维特性,但在非理想条件下杂波起伏剧烈,并且不同地貌环境起伏程度差别较大.

To the issue of MIMO airborne radar clutter modeling under different environment conditions,a clutter modeling method based on composite model was proposed by taking clutter amplitude distribution model,clutter cell scattering model and radar parameter model into consideration.Then,the error factors such as element error,channel uncertainty,clutter fluctuation were analyzed,and a clutter modeling method based on composite model under nonideal conditions was proposed.Finally,computer simulations were made to the space-time MV spectrum and the characteristic spectrum under different error conditions,different clutter amplitudes,and the back-scatter coefficients,through changing the model parameters.The simulation results show that:in ideal conditions,the clutter spectrum has good space-time characteristic;while in nonideal conditions,the clutter fluctuates tempestuously,and fluctuation is different under different environment conditions.